[TASK] Make PHP highlighting work for snippets
[TASK] Make PHP highlighting work for snippets

This adds the "official" hack to turn on startinline for all php
codeblocks whether they're a snippet or a full file.

Sphinx and docutils don't support setting the startinline option for
pygments. That means that snippets of PHP code that don't have
"<?php ?>" don't get highlighted. The hack was documented here:
http://mbless.de/blog/2015/03/02/php-syntax-highlighting-in-sphinx.html
https://github.com/fabpot/sphinx-php

Change-Id: I4e0cd22ff15516931dc5c6b0bb81c3e7079a3965
Releases: master, 3.0, 2.3, 2.2, 2.1, 2.0, 1.1
Original-Commit-Hash: 38cb0e82a7d2b554b6e8dbbb1ca461b2ae6f417f

aertmann/flow-development-collection,bwaidelich/flow-development-collection,dfeyer/flow-development-collection,robertlemke/flow-development-collection,fcool/flow-development-collection,mkeitsch/flow-development-collection,robertlemke/flow-development-collection,fcool/flow-development-collection,dfeyer/flow-development-collection,dlubitz/flow-development-collection,chewbakartik/flow-development-collection,kitsunet/flow-development-collection,fcool/flow-development-collection,neos/flow-development-collection,dfeyer/flow-development-collection,gerhard-boden/flow-development-collection,daniellienert/flow-development-collection,kdambekalns/flow-development-collection,mkeitsch/flow-development-collection,dlubitz/flow-development-collection,neos/flow-development-collection,neos/flow-development-collection,mkeitsch/flow-development-collection,chewbakartik/flow-development-collection,albe/flow-development-collection,aertmann/flow-development-collection,daniellienert/flow-development-collection,daniellienert/flow-development-collection,albe/flow-development-collection,albe/flow-development-collection,neos/flow-development-collection,robertlemke/flow-development-collection,aertmann/flow-development-collection,kdambekalns/flow-development-collection,kdambekalns/flow-development-collection,kdambekalns/flow-development-collection,dlubitz/flow-development-collection,robertlemke/flow-development-collection,fcool/flow-development-collection,chewbakartik/flow-development-collection,dfeyer/flow-development-collection,kitsunet/flow-development-collection,bwaidelich/flow-development-collection,gerhard-boden/flow-development-collection,gerhard-boden/flow-development-collection,bwaidelich/flow-development-collection,kitsunet/flow-development-collection